Leather-skiving machine



UNrn dramas arena amen,

CHARLES H. BAYLEY, OF BOSTON, MASSACHUSETTS.

LEATHER SKIVING MACHlNE SPECIFICATION forming part of Letters Patent No. 391,575, dated October 23, 1888.

Application filed May 31, 1688. Serial No. 275,596. (No model.)

To aZZ whom it may concern.-

Be it known that I, CHARLES H. BAYLEY, of Boston, county of Suffolk, and State of Massachusetts, have invented an Improvement in Leather-Skiving Machines, of which the following description, in connection with the accompanying drawings, is a specification, like letters on the drawings representinglike parts.

My invention relates to a leather-skiving machine, and is intended as an improvement on machines of the class shown in Letters Patent No. 220,906, dated October 28, 1879, said machines comprising devices for supporting and feeding the stock to be operated upon and a rotating knife or cutter that acts on the stock to skive or trim the edge thereof. In machines of this class, as heretofore made, the parts have been all actuated from a main shaft, which is connected by speed-reducing gearing with a the supporting and feeding devices for the stock or material to be operated upon, and is also connected by multiplying beveled gears with the shaft that carries the rotating knife or cutter that acts on said ma terial. The said cuttershaft is made adj ustable on the frame-work of the machine, in order to set the cutter in proper position with relation to the material being skived, and when the cutter-shaft is driven from the main shaft by beveled gearing such adjustment of the cutter-shaft throws the gears out of proper position with relation to one another, so that they do not work to the best advantage, and with certain adjustments of the cutter-shaft the gears are caused to runnoisily, consuming a large amount of power and producing considerable wear upon the gears. As the main and cutter shafts are about at right angles to one another and in the same plane, it is not possible to substitute pulleys and a belt connecting them directly for the bevel-gearing commonly employed, and no means for driving the cutter-shaft of machines of this class have been devised, so far as known to me, other than the bevel-gearing shown in the patent referred to, or by driving the cuttershaft from some other counter-shaft not mounting upon or forming an immediate and integral part of the frame-work of the machine, nor forming a part of the machine proper; and, as an illustration of this second exception, I refer to Patent No. 363,265, dated May 17,

1887, in which the main shaft of the machine is omitted and a separate and auxiliary frame or stand is set up at a distance from the machine, and this is supplied with two shafts and numerous pulleys on them, which pulleys are belted to the skiving-machine proper as follows: by one belt with the feed-roller shaft; by another belt with ,the lower cutter-disk shaft; by still another belt with the upper cutter-disk shaft, and the shafts of the auxiliary frame are belted together and to a source of power.

The object of the present invention is to remove the objections to such means for actuating the cutter-shaft; and the invention con sists, mainly, in novel means for transmitting the power from the main shaft to the cuttershaft, by which a wider range of adjustment of the latter is rendered 'possible, and by which the cuttershaft is driven easily and noiselessly in all positions required for the operation of the machine. The novel connecting mechanism between the main shaft and cutter-shaft may be applied to existing machines without changing the positions of said shafts with relation to one another and without material change in the other parts of the machine.

In order to provide for the proper actuation of the cutter'shaft in its various adjustments with relation to the other parts of the machine in accordance with this invention, the said main and cutter shafts are each provided with belt-pulleys, and one or more idlers or intermediatebelt-supporting pulleys are provided in order to enable the power to be transmitted from the main to the cutter shaft by a belt, the said idlers being supported on a bracket connected with the frame-work of the machine.

In order to provide means for regulating the tightness of the belt, one idler or intermediate pulley is made adjustable on its supporting frame-work.

In order to get the best results, the machine is, as shown in this instance,provided with two idlers or intermediate pulleys which support and guide the belt as it passes from the pulley on the main shaft to the pulley on the cuttershaft, said idlers being in planes substantially at right angles to one another, and one substantially parallel with each driving-pulley, such construction affording a sufficient length of belt without unduly increasing the size of the framework of the machine and without twist or crossing of the belt. Thus it will be seen I retain the shafts of the skiving-maehine proper in this reorganization of it, and all the parts of the driving mechanism are arranged upon the frame-work of the machine, thereby economizing in space and material.

Figure l is an end elevation of a skivingmachine embodying this invention; Fig. 2, a plan View of aportion thereof, showing the connecting mechanism between the main and cutter shafts; Fig. 3, a side elevation of aportion of the machine; and Figs. 4 and 5, details to be referred to.

The main shaft a, provided with worms a a co-operating with worm'gears b c on shafts b c, the former carrying the feed-disk b and the latter being connected by beveled gearing c with the shaft 0 that supports and operates the leather supporting and feeding roll 0*, may all be substantially the same as in the machine shown in Patent No. 220,906, before referred to, the said roll 0 and disk 12 being driven at a comparatively slow speed and operating to present the material to the rotating cutter d, which also is in substantially the same relation to the feeding devices, and operates in substantially the same manner upon the leather as in the machines of said former patent.

The shaft 0 of the rotating knife or cutter d has its bearing in a bracket, 6, adjustably connected with the framework, and the said shaft is longitudinally adjustable in its bearings by an adjusting device, e which parts are now commonly used on machines of this class and need not be shown and described in detail, as they are not herein claimed. These adjustments of the shaft 0 and its bearings are for the purpose of changing the position of the cutter relative to the material supported and fed by the devices 0 b, as the angle and thickness of the portion of the material being cut varies, and the shaft e and cutter d should be driven at a much higher rate of speed than the devices 0* d that support and feed the leather.

In order to drive the shaft 6 at a proper speed in the various positions in which it may be necessary to place it, the said shaft is, in accordance with this invention, provided with a belt-pulley, f, and the main shaft a is also provided with a belt-pulley, g, of larger diam eter than the pulley f, so that a belt carried from one to the other of said pulleys will drive the shaft 6 ata higher speed than the shaft a. The said shafts a and e are in such positions with relation to one another that it is impracticable to connect them directly by a belt, and in order to provide for the transmission of power from one to the other of said shafts by a belt the machine is provided with one or more intermediate pulleys supported on a bracket or extension, k, of the frame-work, which bracket may be fastened upon the main frame-work A of the machine, as best shown in Fig. 5, which is a section through the main frame A. at m, Fig. 3. As shown in this instance, two intermediate pullies, h and i, are provided, which support and guide the belt between the pulleysf and g, the said pulley t having its bearing upon an arm, projecting from the bracket k, and the pulley h having its bearing on an arm, k pivoted at 10 at the end of the bracket k, and acted upon by an adjusting device, k shown as a screw pass ing through a nut pivotally connected with the said arm 70*, and bearing at its end against a shoulder on the bracket, (see Fig. 4,) so that the said arm may be swung toward or from the main shaft in order to slacken or tighten the belt.

The pulleysf and g to be connected by the belt are in planes nearly at right angles to one another, and the pulleys h and t are also in planes nearly at right angles to one another, and so arranged that the belt runs nearly in the planes of the pulleys from one pulley to the other, the said belt passing, as shown at m, from the upper part of the pulley g to the upper part of the pulley h; then, as shown at m, from the under part of the pulley h to the side of the pulley f nearest the pulley g; thence, as shown at W, from the other side of said pulleyf to one side of the pulley 'i, from the other side of which it passes, as shown at m to the under side of the pulley g on the main shaft. By this arrangement the belt runs naturally and easily in all positions of the pulley f required for the various adjustments of the cuttershaft and cutter, and the belt is of sufficient length to run properly, and its tension may be adjusted by the device In, the

said results being obtained without greatly increasing the size of the frame-Work of the machine and space occupied by it, and without changing the position of the main shaft with relation to the frame-work and other parts of the machine, so that the cutter-actuating devices may be readily applied to machines already constructed.

It is proper to say that prior to my inven tion pulleys and shafts have been arranged and so connected by belting as to transmit motion to a shaft at ri ht angles or other angles to the prime mover, examples of which may be seen in Patents Nos. 242,344, of May 31, 1881, and 308,417, of November 25, 1884.

I claim- 1. In a leather-skiving machine, the usual main frame, A, combined with and supporting the main shaft having the pulley g and actuating usual leather supporting and feeding devices, and the cutter-shaft having the pulley f in a plane substantially at right angles to the first-named pulley, combined with the intermediate pulley, h, arranged in the plane of the pulley g, the pulley z, situated in a plane substantially at right angles to the last-named pulleys, and the connecting-belt, substantially as shown and described.

2. In a leather-skiving machine, the usual main frame, A, combined with and supporting and the connecting-belt, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

'lflAPtLES H. BAYLEY.

Vitnesses:

Jos. P. LIVERMORE, M. E. HILL. 

